I have information on the line of Posthumus/Beimers you are looking for. Esther and Dowe had 7 boys that I am aware of. My GGrandmother was Elsie Posthumus and have a GREAT deal of family info. I was born in GRapids and my GGrandmother kept a journal of info. If you (or anyone else w/interest in this line) would like to exchange information, please let me know.